On 3/8/06, Eddie Kohler <kohler@xxxxxxxxxxx> wrote: > Hi Arnaldo, > > Arnaldo Carvalho de Melo wrote: > >>The Init Cookie option lets the server package up all that state, send it to > >>the client, and forget it. The server might still have to load a CCID, but > >>that doesn't worry me -- we only have 3 CCIDs. > > > > > > Sure, Init Cookie will be eventually implemented, but I want to > > support everything > > that is specified in the draft, and furthermore, reworking the core Linux INET > > infrastructure to have TCP and DCCP sharing _everything_ that is not specific to > > one of them, that has been my goal since day one, if I decided just to implement > > Init Cookies I would have a much easier ride, but I'm stubborn on supporting all > > the things specified in the draft to the best of my capacity use this > > implementation > > to fully validate the draft in the Real World(tm), even if takes more time 8) > > > > If one looks at work Eric Dumazet, Ben LaHaise and others are doing on improving > > TCP that _already_ are helping DCCP due to all this code sharing, its > > wonderful, I > > really, really didn't wanted to go the SCTP way where few things is shared with > > other INET connection oriented protocols (well, at the time there was > > only TCP :P). > > This is a great approach! But TCP implements syn cookies, which is very > similar to the Init Cookie. So Init Cookies are not totally DCCP-only. I'm > just saying the DOS need not be such a big deal. Sure, my idea is to abstract TCP syncookies/DCCP Init Cookies at the struct inet_request_sock level, then both will have the same code flow :-) So stay tuned as after we get the feature negotiation mostly working I'll attack this new syncookies/init cookie abstraction. Ah, another thing in the backburner is to support DCCPv6 only, i.e. right now we have dccp_ipv4 and dccp_ipv6 modules, but dccp_ipv6 still requires dccp_ipv4 due to v6 mapped v4 addresses, that is not selectable, but I'll rework this code at the inet_connection_sock level to make it possible to have a IPv6 only setup, paving the way for IPv4 retirement as I promised to DaveM 8-) :-P - Arnaldo - : send the line "unsubscribe dccp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
